Malicious PDF — malware analysis report

Static analysis result for SHA-256 4980a7c451e780a1…

MALICIOUS

PDF

53.1 KB Created: 2020-08-19 20:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3b39af685e68f26cf1ca66dffdbde069 SHA-1: bdca93d78e26a45cd7f124523386fcd94d0f4533 SHA-256: 4980a7c451e780a1feb6d075019e9ec95e739f150ddd86b36142e5a0f7b50c5e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one heuristic specifically identifying a malicious redirector at 'https://ttraff.ru/pify?keyword=aocs+official+method+pdf'. Another heuristic indicates a link farm structure, suggesting an attempt to manipulate search engine results or distribute content broadly. The document body is heavily obfuscated but contains the target URL, reinforcing the malicious intent. No scripts were extracted, but the PDF structure itself is used to facilitate the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=aocs+official+method+pdf In PDF document text
    • http://files.dowdystaxidermy.com/uploads/1/3/0/7/130740298/mowupugugomijib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0264/2075/files/72240623012.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zonamanasalusowalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/noritisawijesataluwotonok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/luzazomudewidawiwatoreju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/all_adverbs_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6866/7542/files/3650209168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8951/7973/files/munakusirofoxafiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0802/2938/files/47503371675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63545483179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/catalytic_hydrogenation_in_organic_syntheses.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9180 5288 bytes
SHA-256: 263b828eb7bb2737e4f9b33b043a73b69c973c800c81e14f8a9ceaa335241561
font_01_sfnt_off0000a356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA356 10628 bytes
SHA-256: c339257b1260b5dd0b1550d87df2967c17234a2c5e95a6878a5735a96f90f318

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